LED fluorescent lamp as a light is soft and the effective light source is popular all over the world, whether in the household, shops, offices, schools, supermarkets, hospitals, theatres, or in a commercial freezer, advertising light boxes, the subway, the pedestrian tunnel, civil air defense project, night lighting, lighting, etc., as long as you both need to lighting to LED fluorescent lamp. But, for the LED fluorescent lamp, manufacturers face a tricky problem, that’s dazzling LED fluorescent lamp and the light spot and the question of directionality is strong.
For LED glare problem, at present each manufacturer of a variety of methods, has been adopted after using wire drawing PC mask, mask using grinding sand, with the use of special phosphor materials, etc., but these methods are not very ideal, drawing mask can eliminate dazzling, but light phenomenon is more serious, people under the lamp time slightly longer eye fatigue, with eyes, if long time under the lamp, can also lead to eye astigmatism, sanded and ivory mask method is used in optical loss is too big, bad effect.
In this case, the optical film can be used, in general, using the optical film has the following advantages:
1. Remove the LED characteristic of light. Due to the LED fluorescent lamp is arranged two or three rows of rules, so there will be a space between each point light sources emit light, so that within a certain distance in produce spot, with optical film, optical diaphragm will incident point light source the light evenly spread, spread into a light source, so the light becomes very evenly, thoroughly solve the problem of light spot.
2. Broaden the irradiation Angle. LED a very strong direction, irradiation Angle is about 120 degrees or so, it is easy to produce lighting blind area; By optical diaphragm, due to the unique optical diaphragm diffusivity, light range can be extended to 180 degrees, so that we can effectively eliminate lighting blind spots. LED fluorescent lamp using optical diaphragm bring direct benefit is that using the same number of LED fluorescent lamp lighting, in the same area of space, the diaphragm of the LED fluorescent lamp irradiation with no blind area, uniform light, LED fluorescent lamp lighting effects are far more than ordinary. And the lighting area is larger, this advantage, the more obvious.